DOI: 10.1029/2018JA025596
Scopus记录号: 2-s2.0-85051054493
论文题名: Investigation of the Abnormal Quasi 2-Day Wave Activities During the Sudden Stratospheric Warming Period of January 2006
作者: Gu S.-Y. ; Dou X. ; Pancheva D. ; Yi W. ; Chen T.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 7 起始页码: 6031
结束页码: 6041
语种: 英语
英文关键词: anomalous behaviors
; quasi 2-day wave
; sudden stratospheric warming
英文摘要: A quasi 2-day wave (QTDW) during the austral summer period usually coincides with a sudden stratospheric warming (SSW) event in the winter hemisphere, while the SSW influences on QTDWs are not totally understood. In this work, the hourly Navy Operational Global Atmospheric Prediction System-Advanced Level Physics High Altitude reanalysis data sets during January/February 2006 are utilized to study the contribution of a major SSW on the anomalous QTDW activities during the same period. Our new findings are generalized as follows: (1) The summer easterly is enhanced during a SSW event due to the interhemispheric coupling, which is clearly indicated by the anomalous cross-equator circulation from the winter to summer mesosphere. (2) The enhanced summer easterly could sustain critical layers for QTDWs with larger phase speeds (e.g., smaller zonal wave number or shortwave period) and strengthen the summer easterly barotropic/baroclinic instabilities, which are essential for the QTDW amplification through wave-mean flow interactions. This is why a strong westward QTDW with zonal wave number 2 is identified besides the conventionally dominant wave mode of wave number 3, and their periods are only ~42–45 hr during January 2006. (3) The strong winter planetary waves during SSW periods facilitate the occurrence of the nonlinear interaction between QTDWs and stationary planetary waves, which is strongly suggested by the abnormal temporal variations of wave number 2 and wave number 3 QTDWs. We conclude that the anomalous QTDW behaviors in summer mesosphere during January 2006 are associated with the major SSW event in the winter stratosphere. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113583
Appears in Collections: 气候减缓与适应
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作者单位: School of Electronic Information, Wuhan University, Wuhan, China; Department of Geophysics and Planetary Science, University of Science and Technology of China, Hefei, China; National Institute of Geophysics, Geodesy and Geography, BAS, Sofia, Bulgaria
Recommended Citation:
Gu S.-Y.,Dou X.,Pancheva D.,et al. Investigation of the Abnormal Quasi 2-Day Wave Activities During the Sudden Stratospheric Warming Period of January 2006[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)